Cita APA (7th ed.)
Hein, M. (1988). College chemistry: An introduction to general, organic, and biochemistry (4th ed.). Brooks/Cole.
Cita Chicago (17th ed.)
Hein, Morris. College Chemistry: An Introduction to General, Organic, and Biochemistry. 4th ed. Pacific Grove: Brooks/Cole, 1988.
Cita MLA (9th ed.)
Hein, Morris. College Chemistry: An Introduction to General, Organic, and Biochemistry. 4th ed. Brooks/Cole, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.